Disability tax credit for autism: how the CRA decides

Autism does not qualify for the disability tax credit automatically. The Canada Revenue Agency decides on the effects of an impairment rather than on a list of diagnoses: it looks at how much an impairment restricts everyday functioning, how often and for how long. This guide applies that test to autistic children and adults, gives the 2025 and 2026 amounts, covers this year's application changes and lists what approval opens, including the Registered Disability Savings Plan.

Does autism qualify for the disability tax credit?

Autism can qualify, but the diagnosis alone does not. The CRA approves the credit when a medical practitioner certifies a severe and prolonged impairment that markedly restricts an everyday activity, most often mental functions, all or almost all of the time, for at least 12 months. Two autistic people with the same diagnosis can receive different decisions.

The CRA states on its mental functions eligibility page that eligibility is based on the effects of an impairment, not on a diagnosis or the presence of a medical condition. Its technical guidance on the credit, Income Tax Folio S1-F1-C2, says the same thing and names only two exceptions where the condition itself settles the question: blindness and type 1 diabetes. Autism is not one of them.

Two consequences follow. A diagnostic report, however detailed, is not an application: what matters is Part B of Form T2201, where the practitioner describes what the person can and cannot do. And support levels from diagnostic reports, such as level 1, 2 or 3, are not part of the CRA test, so every file needs restrictions documented in daily-life terms.

Our disability tax credit page covers the credit in general, and our mental health guide covers conditions that often fluctuate. Autism is lifelong and present from early childhood, so the questions here are about how restrictions show up at different ages.

Which mental functions does the CRA look at for autism?

The CRA lists ten groups of mental functions necessary for everyday life, from adaptive functioning and judgment to regulating behaviour and understanding verbal and non-verbal cues. An application does not need restrictions in every group. It needs a clear description of the groups where restrictions are marked and how they affect ordinary days.

The table pairs groups the CRA names with situations a practitioner might describe. The examples illustrate what to document; they are not a checklist that guarantees approval.

The CRA list also includes memory and perception of reality, which belong in the description when they are affected. Restrictions should be described as they appear with the therapy, medication and supports the person already uses, because the test asks whether they persist even with them.

How severe and how often does the restriction have to be?

All three criteria must be met. The person is unable to perform the mental functions, or takes three times longer than someone of similar age without the impairment. The restriction is present all or almost all of the time, which the CRA describes as generally 90 percent or more. It has lasted or is expected to last at least 12 months.

For autism, duration is rarely the obstacle; frequency is. In the CRA's own video on mental functions, a child with behavioural difficulties had improved with medication and therapy and behaved quite differently at school and at home. The CRA concludes that, because of that difference, the impairment was not present all or substantially all of the time, so the child would not qualify.

Good days do not disqualify anyone. The certificate should describe the restriction at home, at school or work and in the community, and say whether supports in one place, such as a classroom aide, are what keep the person functioning there. A practitioner who sees the person briefly may need written observations from parents, teachers or support workers.

The comparison with "someone of similar age" matters most for children. A four-year-old who cannot dress alone is not restricted, because most four-year-olds need help. A ten-year-old who still needs that help every day, because of the impairment, may be.

Can a child with autism get the disability tax credit?

Yes, children can be approved, and a parent can claim the credit for them. A child under 18 on December 31 receives the base disability amount plus a supplement for children. Because most children have no tax to reduce, the unused amount is usually transferred to a supporting parent, who claims it on line 31800 of their return.

The amounts below come from the CRA's claiming page and its 2026 indexation table. The tax value shown is the claim amount multiplied by the lowest federal rate, which is the rate applied to non-refundable credits: 14.5 percent for 2025, after the cut from 15 to 14 percent on July 1, 2025, and 14 percent for 2026.

These are maximums for the federal credit. The child supplement shrinks when child care or attendant care expenses above a threshold are claimed for the same child; the threshold is $3,464 for 2025 and $3,533 for 2026. Provinces and territories add their own disability amount on the provincial return, which our Ontario guide sets out for one province. Because the credit is non-refundable, it only reduces tax owing; it is never paid out as cash on its own.

A supporting parent not named in Part A can send the CRA a signed written request describing the support provided. Our guide to transferring the disability tax credit covers who counts as a supporting family member.

Can an autistic adult qualify, including after a late diagnosis?

Yes. The same three criteria apply at any age, and the comparison is with adults of similar age. An adult diagnosed late can still be approved, and if the restrictions existed in earlier years, the CRA can approve those years too. Approved years can then be claimed on past returns, going back up to 10 years.

The CRA's criteria contain no employment test and no question about grades, so holding a job does not exclude an adult on that basis. The certificate still needs to show the restriction all or almost all of the time, including the support that makes work possible. The folio adds that a disability pension or insurance benefit does not make someone eligible automatically.

The approved years appear on the notice of determination, and our article on the retroactive disability tax credit explains how past returns are then adjusted.

Can autism qualify under speaking or the cumulative effect?

Sometimes. Mental functions is the category most people think of for autism, but an autistic person who cannot speak so as to be understood by a familiar person in a quiet setting may meet the speaking criteria. Someone whose restrictions fall short of marked in any single category may qualify when significant limitations in two or more categories combine.

The speaking test is specific: being unable to speak so as to be understood by a familiar person in a quiet setting, or taking three times longer than someone of similar age, all or almost all of the time, for 12 months or more, even with therapy and devices. A speech-language pathologist can certify this category, as can a medical doctor or nurse practitioner.

The cumulative effect route combines limitations in two or more of these categories: walking, mental functions, dressing, feeding, eliminating, speaking, hearing and vision. The limitations must exist together all or almost all of the time, and their combined impact must equal a marked restriction in one category. Significant limitations in mental functions together with dressing or feeding may fit some autistic people better than one marked restriction.

Who can certify autism, and how do you apply in 2026?

For mental functions, a medical doctor, nurse practitioner or psychologist can certify Part B. For speaking, a speech-language pathologist can as well, and an occupational therapist can certify walking, feeding and dressing. You apply with the CRA's digital form or the paper Form T2201, and both parts must use the same method.

Two changes this year affect families who prepared a paper file earlier. Since July 14, 2026, DTC applications can no longer be sent through the "submit documents" section of a CRA account unless the CRA asks for more information. Since September 8, 2026, the CRA no longer accepts versions of Form T2201 from before 2023, according to its June 2026 notice.

Before the appointment, bring written examples: how long the morning routine takes, what prompts are needed, what happens when plans change, and reports from school, therapists or employers. The CRA's application instructions say practitioners may rely on reported symptoms, medical history, direct observation and their knowledge of the condition. A fee charged for completing the form may be claimed as a medical expense. Our T2201 form guide walks through each section.

What does DTC approval unlock for an autistic child or adult?

Approval is the entry ticket to several federal programs. For a child, the main one is the child disability benefit, paid automatically to families already receiving the Canada child benefit. Until the end of the year the beneficiary turns 59, it opens the Registered Disability Savings Plan, and from 18 to 64 it is required for the Canada Disability Benefit.

When the child disability benefit is paid for the first time, the CRA calculates the current and two previous benefit years automatically, according to its child disability benefit page. The Canada Disability Benefit adds a one-time $150 supplemental payment from fall 2026 toward the cost of obtaining the DTC, and RDSP income is excluded from the income used to calculate it.

The RDSP needs its own application with a bank, credit union or investment firm. For a minor, the plan holder can be a parent or legal representative. When an autistic beneficiary becomes an adult, the federal rules on plan holders require the adult to be the holder if they can enter into a contract. If there are concerns about that ability, a legal representative holds the plan, or, when there is none, a spouse, common-law partner, parent or adult sibling can. For 2026, a family income of $117,045 or less earns $3 of grant for each of the first $500 contributed and $2 for each of the next $1,000. Our RDSP grant and bond guide covers the income tiers and carry-forward.

What if the CRA denies an autism application?

The notice of determination explains why. You can request a review and send information that was not in the first file, such as new reports or a letter from a practitioner who knows the person well. You also have the right to file a formal income tax objection within 90 days of the notice date.

Compare the original Part B with the reasons in the notice, especially where it names the diagnosis but describes restrictions only in general terms or suggests they happen some of the time. A review request is mailed to the tax centre that processed the application. If an approval has an expiry date, the CRA sends a reminder a year before it ends.

Frequently asked questions

Does level 1 autism qualify for the disability tax credit?

It can. The CRA does not use diagnostic support levels. It asks whether the impairment markedly restricts everyday mental functions or another category all or almost all of the time, for at least 12 months. A person described as level 1 can be approved when the certificate shows restrictions that meet that test.

Does ADHD qualify for the disability tax credit in Canada?

ADHD is assessed the same way as autism: on its effects, not the diagnosis. It qualifies when a practitioner certifies a marked restriction in mental functions, or significant limitations that combine, all or almost all of the time for 12 months or more. When ADHD and autism occur together, the certificate should describe their combined effect.

How much disability tax credit will I get for autism?

The amount is the same for every approved condition. For 2025, the federal claim is $10,138 for an adult and $16,052 for a child under 18, worth up to $1,470.01 and $2,327.54 in federal tax reduction. Provincial amounts are added on top. The real value depends on how much tax is owed.

Who is eligible for the $40,000 disability tax credit?

No CRA rule sets a $40,000 amount. Figures like that come from estimates of a retroactive claim covering several years, often for a child whose parent claims the base amount and supplement on past returns. What is received depends on the years approved and the tax actually owed in each of them.

Can parents claim the disability tax credit for an autistic child?

Yes. Once the CRA approves the child, a supporting parent can claim the unused disability amount and the child supplement on line 31800. Parents who both support the child can split the claim, provided the total does not exceed the maximum. Naming the parent in Part A of the application saves a later written request.

What other benefits can I claim if I am autistic?

DTC approval can lead to the child disability benefit for children, the Canada Disability Benefit for adults aged 18 to 64, an RDSP with federal grants and bonds, and the disability supplement of the Canada workers benefit. Each program has its own conditions, and the RDSP must be opened with a financial institution.

Where to start

Without an application yet, gather written examples from home, school or work before the practitioner fills out Part B. With an approval, check that the child disability benefit is being paid and that an RDSP is open, since unused grant and bond entitlements can be carried forward from up to 10 earlier years of DTC eligibility.

Our team can help you open an RDSP once the DTC is approved and work out which past grant and bond amounts are still available.